Datasheet

SUPPLY CURRENT (mA)
75
55
BELDEN 1694A CABLE LENGTH (m)
0 200100
50 150
60
65
70
LMH0034
SNLS213H –JANUARY 2006–REVISED APRIL 2013 www.ti.com
INPUT INTERFACING
The LMH0034 accepts either differential or single-ended input. The input must be AC coupled. Transformer
coupling is not supported.
The LMH0034 correctly handles equalizer pathological signals for standard definition and high definition serial
digital video, as described in SMPTE RP 178 and RP 198, respectively.
OUTPUT INTERFACING
The SDO and SDO outputs are internally loaded with 50Ω. They produce a 750 mV
P-P
differential output, or a
375 mV
P-P
single-ended output.
APPLICATION INFORMATION
PCB LAYOUT RECOMMENDATIONS
Please refer to the following Application Note: AN-1372 (SNLA071) “LMH0034 PCB Layout Techniques.”
REPLACING THE GENNUM GS1524
The LMH0034 is form-fit-function compatible with the Gennum GS1524 and GS1524A.
SUPPLY CURRENT VS. CABLE LENGTH
The supply current (I
CC
) depends on the amount of cable being equalized. The current is highest for short cable
and decreases as the cable length is increased. Figure 3 shows supply current vs. Belden 1694A cable length for
1.485 Gbps data and Figure 4 shows supply current vs. Belden 1694A cable length for 270 Mbps data.
Figure 3. Supply Current vs. Belden 1694A Cable Length, 1.485 Gbps
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